PRINCIPLE CONNECTION DIAGRAMS

A non-pressure system
NON-PRESSURE SYSTEM
For the non-pressure system the Natural Gravitation is the most simple, but at the same times most economical and reliable principle. The water tower guarantee you enough water and constant pressure even when water supply stops or the electricity is off for a while. In modern buildings such a fresh water storage tank is hidden inside the roof construction, instead of building a water tower.

It is another common principle to use a pressure pump to sup-ply water to your house instead of such an elevated fresh wa-ter storage tank. All non-pressure solar water systems using than a refill feeder.

In case the hot water pressure is not high enough, may be-cause of the roof is not high and the natural gravitation is insufficient, often an additional small low power pressure pump is used at the hot water side.

Having such a second pressure pump for the hot water may result in unstable pressures at the cold and the hot water system as the two pumps pres-sure interacts each other. To enhance the comfort of
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having a stable
temperature during
shower, may an
automatic
termostatic mixing
valve is usefull.

The non-pressure solar water heater is also a simple solution to be placed in the garden, at farms or resorts; or just simply on a flat rooftop.

PRESSURIZED SYSTEM
Pressurized systems having several advantages! Mainly that the pressure at the hot water site is the same as at the cold water site, be-cause the solar system is direct connected to the main water supply. Whatever is the pressure at the main water supply is also the pressure at the hot water. This made the system very comfortable in operation. Further there is no additional pressure pump needed.

There are no movable parts, for that the system is mainte-nance free. Only in the case that the insulated pressure tank can not be installed in a higher position than the collector panels, or in case of a long distance between tank and panels a small low power circulation pump together with an electronic controller is needed.

Non-pressure system


Chiang Mai Solar is a brand of Oelmaier Technology Company Limited
40 Moo 2, Si Bunrueang Road, Soi 4, T. Nonghoi, A. Muang, Chiang Mai 50000, Thailand, info@chiangmaisolar.com
> Thermosyphon
> Feed from elevated water tower
> Supply water also during power cut
> No need refill feeder
> Tank outside on the roof

Non-pressure system

A non-pressure system
> Thermosyphon
> Feed from pressure pump or public water supply
> Tank outside on the roof

Non-pressure system on the ground

> Thermosyphon
> Feed from pressure pump or public water supply
> Need hot water pressure pump
> Tank outside
A non-pressure system on the ground

Pressurized system

> Thermosyphon
> Feed from pressure pump or public water supply
> Equal pressure on hot and cold water feed
> Pressure tank hidden inside the roof